code: def t4():
      return torch.tensor(
          [
              [1.0, 2.0, 3.0],
              [4.0, 5.0, 6.0],
              [1.0, 2.0, 3.0],
              [4.0, 5.0, 6.0],
              [1.0, 2.0, 3.0],
              [4.0, 5.0, 6.0],
          ]
      )
  
file_path: FATE/python/fate/test/test_matmul.py
imports: import torch
  from fate.arch.computing.backends.standalone import CSession
  from fate.arch.context import Context
  from fate.arch.federation.backends.standalone import StandaloneFederation
  from fate.arch.tensor import DTensor
  from pytest import fixture
label_desc: Use image node_id 4 for calling a global function with example usage: t4() and returns: torch